20 



AMAZONIA AND LA PLATA. 



The rivers of Frencû Guiana following the Maroni in the direction of the east 

 have their source not on the Amazonian water-parting, but in a few isolated hills 

 lying midway between that range and the sea. Of these streams the largest are 

 the Mana, the Sinuamari, the Appvouague, each of which is about 200 miles long, 



Fig. 7. — RrvERS of the Franco-Bbaziliax Contested Zone. 

 Scale 1 : 1,600,000. 



to 16 

 Feet. 



Depths. 



16 to 32 



Feet. 



32 Feet 

 and upwards. 



, 30 Miles. 



traversing sparsely peopkd districts, and flowing in straight courses to the coast, 

 which here trends round to the south-east. 



Beyond them follows the Oyapok, whose name, applied to several other water- 

 courses, and derived from the Indian words u>/apucu, "long river," would be more 



